LC242R Solid State Relay SPST-NO 2A 12-280V Equivalent & Substitute Parts

Part Overview

The LC242R is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 2A load current across 12V to 280V AC output. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and new design implementations.

The LC242R operates with a 4-10VDC input control signal and is packaged in a 4-SIP through-hole configuration with PC pin termination. Due to its obsolete status, direct replacements from active product lines are necessary for procurement and long-term supply chain continuity.

Substiute Parts

LC242R

Sensata-CrydomIn Stock: 1071LC242R Datasheet

Current PartRFQ

ASO242R

Sensata-CrydomIn Stock: 1237ASO242R Datasheet

DirectRFQ

SSRA-240D2R

TE Connectivity Potter & Brumfield RelaysIn Stock: 5008SSRA-240D2R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LC242R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO (1 Form A)
• Output type: AC
• Input voltage range: 4 ~ 10VDC
• Load current rating: 2 A minimum
• Package / Case: 4-SIP
• Termination style: PC Pin
• Mounting type: Through Hole

Acceptable Variation Parameters:

• Load voltage range: Substitute must support the full 12-280V range or a subset that includes the application's operating voltage
• Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align
• Product status: Active products preferred for long-term availability
• Compliance certifications: RoHS3 compliance and REACH status acceptable as improvements over original

The identified substitute parts meet these criteria and are suitable for direct replacement in applications currently using the LC242R.

Parameter Comparison

Engineering Selection Recommendations

ASO242R (Direct Substitute - Recommended Primary Choice)

The ASO242R is manufactured by Sensata-Crydom, the original LC242R manufacturer, and maintains identical electrical specifications across all critical parameters. This part carries active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance provides environmental regulatory alignment. The ASO242R is the preferred direct replacement for LC242R applications.

SSRA-240D2R (Similar Substitute - Conditional Use)

The SSRA-240D2R, manufactured by TE Connectivity Potter & Brumfield Relays, matches all electrical and mechanical parameters with one exception: the load voltage range begins at 24V rather than 12V. This part is suitable for applications where the minimum load voltage is 24V or higher. The SSRA-240D2R offers active product status and RoHS3 compliance. Use this substitute only when the application's load voltage does not require operation below 24V.

Frequently Asked Questions (FAQ)

Q: Can the ASO242R be used as a direct replacement for the LC242R?

A: Yes. The ASO242R is electrically and mechanically identical to the LC242R across all critical parameters: SPST-NO circuit configuration, 4-10VDC input, 12-280V load voltage, 2A current rating, 4-SIP package, and PC pin termination. The ASO242R is the recommended direct substitute.

Q: What is the key difference between the SSRA-240D2R and the LC242R?

A: The SSRA-240D2R has a minimum load voltage of 24V, whereas the LC242R operates from 12V. All other electrical and mechanical specifications are identical. The SSRA-240D2R is suitable only for applications where the load voltage is 24V or higher.

Q: Are both substitute parts available in the same package configuration?

A: Yes. Both ASO242R and SSRA-240D2R are packaged in 4-SIP with PC pin termination, matching the LC242R's through-hole mounting configuration. No PCB layout modifications are required for either substitute.

Q: Do the substitute parts meet current environmental compliance standards?

A: Both ASO242R and SSRA-240D2R are RoHS3 compliant and REACH unaffected, meeting current environmental regulatory requirements. The LC242R's compliance status was not specified in the original documentation.

Q: Which substitute should be selected for a new design?

A: The ASO242R is the recommended choice for new designs due to its identical specifications to the LC242R and active product status from the original manufacturer. The SSRA-240D2R may be considered if load voltage requirements are 24V or higher and supply constraints favor TE Connectivity sourcing.